Graphics Reference
In-Depth Information
playerGO2 will hold a reference to the second player when a cooperative game is
selected from the main menu and totalPlayers is greater than 1:
// if we have a two-player game, let's grab that second
// player's gameobject too
if( totalPlayers>1 )
playerGO2= SpawnController.Instance.GetPlayerGO( 1 );
When a level begins, a game controller prefab is instantiated. Within the child
objects of the game controller prefab are several objects central to the game, one of
which is a camera named GameCamera. Until the game controller prefab is added to
the scene, the in-game levels have no camera. As the Init() function runs on the game
controller script, it grabs a reference to the camera here and repositions it at the cor-
rect point for starting the level. CameraTransform is used to hold the main reference:
// find the game camera
CameraTransform = GameObject.Find("GameCamera").transform;
// position the camera at the specified start position
// (set in the Unity editor Inspector window on this
// component)
tempVec3 = CameraTransform.localPosition;
tempVec3.z = CameraStartPositionZ;
CameraTransform.localPosition = tempVec3;
The variable cameraControl holds a reference to the camera controller script:
// if we don't have a camera control script object set by
// the editor, try to find one
cameraControl=
CameraTransform.GetComponent<BaseCameraController>();
As a top-down scrolling shoot 'em up game, the scrolling of the level is continuous
until isStopped is true. The isStopped Boolean variable will be used to stop scrolling when
the player reaches the boss battle:
isStopped=false;
To be able to change game scenes, this script needs to have a reference to the scene
manager. It looks for the scene manager in the GetSceneManager() function:
// make sure we have a scene manager to talk to
GetSceneManager ();
didInit=true;
}
After all of the main updates are done, the camera is moved forward through the level
a little more in LateUpdate(). During the game, there are several really important objects
parented to the camera that will be moved along with it. These are
BulletDestroyer
A large invisible object with a box collider on. There are two of these objects, located just of
camera, blocking the path across the width of the play area for projectiles. One is at the top
of the play area, one at the bottom. When a projectile hits the collider, it is destroyed. This
stops projectiles from firing off into infinity.
